You should check out the PTWDG and ISDG forums and see if you would like to participate. The former is about 10 months old or so and has quite a large war going on and all teams need participants. And the ISDG has a great little war going on right now as well. The PTWDG is almost entirely in house poly whereasthe ISDG is Poly against the world.
Either way you'll pick up a lot of great tips. my team, Gathering Storm in the PTWDG has several strat forum posters, and watching them I've refined my game considerably, to the point where I can win at Emperor fairly easily (I don't bother with Deity)
Check them out, they are lots of fun and you can put in as much time as you want in them.